Method and apparatus for producing envelopes, paper money bags, or the like



Aug. 6, 1940. oc ET AL 2.210.298

METHOD AND APPARATUS-FOR PRODUCING ENVELOPES.

PAPER MONEY BAGS, OR THE LIKE Filed Dec 25, 193 4 Sheets-Sheet 1 Aug. 6, 1940. F. KRocH ET AL 2.210.298

METHOD AND APPARATUS FOR PRODUCING ENvBLoPEs. PAPER MONEY BAGS, OR THE LIKE Filed Dec. 23, 193'. 4 Sheets-Sheet 2 T Jnren/a/s wh w a Aug. 6, 1940. KRQCH -r 2.210.298

METHOD AND APPARATUS FOR PRODUCING ENVELOPES,

PAPER MONEY BAGS; OR THE LIKE v Filed Dec. 23, 193'. 4 Sheets-Sheet 3 Aug. 6, 1940. F. KROCH El AL 2.210.298

METHOD AND APPARATUS FOR PRODUCING ENVELOPES, PAPER MONEY BAGS, on THE LIKE Filed Dec. 23, 1937 4 Sheets-Sheet 4 Patented Aug. '6, 1940 PATENT OFFICE METHOD AND APPARATUS FOR PRODUCING ENVELOPES, PAPER MONEY BAGS, OR THE LIKE Fritz Kroch, Willy Sandner, and Albert Tcicher,

Le lfl t, Germany;

d, Sandner and said Teicher asslgnors to said Kroch Application December 23, 1937, Serial No. 181,280

In Germany December 28, 1936 6 Claims. (01. 93-62) This invention relates to a method of and apparatus for producing envelopes, paper money bags or the like having a dry-adhesive seal.

Envelopes, money bags or the like having a dry-adhesive seal are so formed that on the yinside of the sealing flap and on the outer face of not allowed to contact with one another unintentionally and thus cause the envelope to be sealed at a premature stage. Envelopes having a dry-adhesive seal cannot be produced, therefore, in the manner hitherto usual in the manuiacture of envelopes adapted to be sealed by a moist gum, as in, the known methods of producing the envelopes there is. no possibility of ensuring that the adhesive strips on the sealing flap and on the outer face of the body of the envelope will not enter into contact with one another.

Envelopes or the like having a dry-adhesive seal are usually produced, therefore, in such fashion that either the complete envelope is manufactured and the dry-adhesive strips are then applied to the finished article, which naturally renders the manufacture more difficult and uneconomicaland necessitates the use of special apparatus, or the envelopes are manufactured on special, complicated machines, which moreover in each case are only suitable for certain sizes.

It is the other object of the invention to provide an improvedmethod of producing envelopes or the like of all sizes having a dry-adhesive seal, which method is simple to perform, corresponds substantially to the previously known methods of producing envelopes adapted to be sealed by a moist gum, and can be carried out on existing envelope-making machines without alteration.

It is a further object of the invention to provide means for applying the dry-adhesive strips to the different side faces of the sheets constituting the envelope blanks, such means also be-' ing distinguished by their simple nature and reliability in operation.

The essence of the new method of producing that of desired order past rollers or other adhesiveapplying means by which the adhesive is applied in both cases in similar fashion, i. e., in downstairs application, the stack of blanks which have moved together after the first application again being drawn apart in similar disposal for the second application, whereupon following the application of the dry-adhesive strips the envelopes or the like are produced from the blanks in the conventional manner on an envelopemaking machine of the known kind.

The essence of an apparatus according to the invention for applying the dry-adhesive strips to the envelope blank consists in the fact that the envelope blanks superimposed in scale-like order, immediately they have moved past an adhesive-applying roller of small diameter, are conducted over a rod, bar, strip, thin roller or the like at such an angle to the conveying direction that each blank, at the moment at which its rear end ceases to bear against the adhesiveapplying roller, jumps with its rear end away from the adhesive-applyingroller inwards, i. e., towards the axis of rotation of the roller, whereby the-application or spreading voi? adhesive to the rear edge of the blank is prevented.

This is a matter of particular importance, as

it is only in this way that the blanks can be well as envelopes having sealing flaps .which taper to a point.

A possible embodiment of the method according to the invention and of an apparatus for applying one or more parallel dry-adhesive strips to the one or other side face of envelope blanks panying drawings.

Fig. 1 shows diagrammatically the application of dry-adhesive strips to the inner faces 01 the sealing flaps of blanks for the production of envelopes of American form.

Fig. 2 shows the application of corresponding dry-adhesive strips to the outer faces of the backs of the envelopes.

Fig. 3 shows an envelope blank with the adhesive strips applied to the different faces there- Fig.4 is an elevational view of an apparatus for applying dry-adhesive strips in accordance both with Fig. l as well as Fig. 2.

Fig. 5 illustrates diagrammatically the operation of an apparatus according to Fig. 4.

Fig. 6 shows .the result of the first operation in a particular method of producing envelopes from the blanks shown in Fig. 3.

Figs. 7 and 8 show the next two stages of this method of production,

Fig. 8 at the same time showing the finished fiaps.

Fig. 11 shows a blank furnished with dry-' adhesive strips on both side faces.

Figs. 12 to 14 illustrate a particular method of producing envelopes having a tapered sealing fiap from the blanks according to Fig. 11.

1 Fig. 15 shows an envelope with tapered sealing flap of the usual form produced from a gummed blank according to Fig. 11.

Fig. 16 illustrates a modified method of producing envelopes having a tapered sealing flap.

In the production of envelopes of American form there are employed envelope blanks It as shown in Figs. 1 to 3. These blanks Ill, stacked in superimposed scale-like order, are conducted past a gumming roller i3 or other adhesiveapplying means in the direction of the arrow l2, for example by means of conveying belts H. In Fig. 1 it is assumed that the blanks III are so moved past the gumming device that by means of the gumming roller i3 the adhesive strips I l are applied first to the inner faces of the sealing fiaps IS in downstairs application.

For the application of the adhesive strips, for example the strips I, there is preferably employed a device according to Figs. 4 or 5. In this apparatus the blanks III to be gummed, in superimposed scale-like disposal, are taken by any desired means of the conventional kind from the magazine l6 and are conducted past the gumming device by conveying belts l1, it, whereupon they'are passed to a suitable device I! for drawing them apart and conveying them through a drying device to the point where they are deposited. As shown clearly by Fig. 5, the blanks III at first pass between the two rollers 20 and 2| and then over the deflecting roller 22 into the part 23 of the conveying device which moves past the roller it of the gumming device. The part 23 of the conveying device is supported by a guide plate 24. The successive blanks I, 2, 3, 4, etc., as shown in Fig. 5, are taken from the container l6, and owing to the reversal of the track by the roller 22 are conducted past the gumming roller l3 in superimposed'scale-like disposal, as shown in Fig. 5, in such a manner that, as clearly shown, the rear ends of the blanks are gummed by the gumming roller l3 in "downstairs fashion.

The blanks ii are then moved atan angle to the direction of feed to the roller l3 over the deflecting rod or thin deflecting roller 25, which is formed by the cross-piece of a yoke 25 (Fig. 4), which by means of its limbs is mounted at 21 to be capable of rocking in the frame of the apparatus and can be rocked by means of a control sudden bend in the path of movement of the blanks caused by the deflecting rod or roller 25 results in the fact that, as clearly shown in Fig. 5, each blank, immediately its rear end has moved past the gumming roller l3 of small diameter, jumps inwards with its rear end towards the axis of the roller, as indicated in the case of the blank I in Fig. 5. In this way it is accomplished that no adhesive is applied to the rear end face of the blank or is capable of being transferred thereto, which might result in the fact that the blanks after moving together would tend to adhere to one another. The blanks I, 2, 3, etc., furnished with the adhesive strips I I are drawn apart by the device 19 and conducted through the drying device 5! of desired embodiment to the point 52 where they are deposited or stacked, the same,

- as clearly shown in Figs. 4 and 5, moving against bars 30.

' After the adhesive strips ll have thus been applied to the blanks l0v the adhesive strips 3| are applied to the backs of the blanks, as shown diagrammatically in Fig. 2, in which the blanks already furnished with the strips ll are again conducted by the conveying belts ll, likewise in the direction of the arrow i2, to the gumming or adhesive-applying roller l3.

To perform the operation just described it is merely necessary to be able to withdraw in desired number from the stacking point 52 the blanks collected at this point and furnished with the adhesive strips It, as indicated in Fig. 4, and to place these stacks in such fashion in the container l6 that when the blanks I pass through the gumming device in the manner described adhesive strips, viz., the strips 3|, are applied by means of the gumming roller i3 to the other side faces as compared with the first operation or, in the case of rectangular blanks, to the other ends of the blanks.

After the blanks in accordance with Fig. 3 have been furnished with the adhesive strips I4 and 3| on different sides the blanks may be made into envelopes having an unfolded or merely a partially folded sealing flap .on an envelopemaking machine of the conventional kind.

It is also possible by means of an envelopemaking machine which is adjusted accordingly at first to fold down the sealing flap ii of each blank It on to the inner face of the latter in accordance with Fig. 6, whereupon the side flaps 32 are folded by the machine against the bottom sealing flap 15, as shown in Fig.7, and finally the rear fiap 33, in accordance with Fig. 8, is folded over against the outer faces of the side flaps 32, 32 and may be secured to the latter by ordinary 811111.

There are then obtained on the envelopemaking machine envelopes or the like in accordance with Fig. 8, in which the flap I5 is folded into the envelope, 1. e., envelopes as described in the German Patent No. 229,718, in which the dryadhesive strips N and 3| are unable to contact with each other unintentionally.

Figs. 9 and show diagrammatically that also in the case of envelopes having tapered flaps the dry-adhesive strips 35 can be applied to the outside of the side flaps 38 of the blanks 31 and the dry-adhesive strips 33 to the inner faces of the tapered flaps 33 in exactly the same fashion as in the case ofthe blanks II for the rectangular envelope and naturally by the same means as indicated in Figs. 4 and 5. It is merely necessary for the one gumming or adhesive-applying roller l3 upon the application of the adhesive strips to the outer faces of the side flaps 36 to be replaced by two coaxially disposed gumming rollers I3, l3.

The gumming rollers l3, l3 must in any case correspond in size to the dimensions of the envelopes to be produced.

From blanks 3] furnished with the adhesive strips 35, 35 and 38, as shown in Fig. 11, it is then possible in the usual fashion to produce on envelope-making machines of the conventional kind envelopes having tapered flaps, such as shown for example in Fig. 15. Blanks according to Fig. 11, however, may also be handled in ordinary envelope-making machines, with slight modifications thereto, in the manner indicated in Figs. 12 to 14.

In this case at first the flaps 39 furnished with the dry-adhesive strips 38 are folded down against the inner faces of the blanks 31 (Fig. 12), whereupon the two side flaps 36 furnished with the dry-adhesive strips '35 on their outer faces are folded down against the fiaps 39 (Fig. 13), and finally the lower fiap 40, which is secured by ordinary gum, is folded on' to the side .flaps 36, there then having been produced, as

shown in Fig. 14, an envelope of the kind described in the German Patent No. 229,718. In an envelope of this kind the sealing flap 39 having the dry adhesive is situated within the envelope, and the dry-adhesive strips 35 and 38 are unable to contact with each other. V

It is possible to use existing envelope-making machines, because it is merely necessary by simple adjustment to vary the order of folding of the flaps, which does not call for any structural alterations to the machines.

The method illustrated in Fig. 16 of producing an envelope according to Fig. 15 differs from the method already described ofproducing an envelope according to Fig. 15 by the fact that in this case at first merely the dry-adhesive strips 35 are applied to the outer faces of the side flaps 36 of the blanks 31, whereupon the envelopes II are completed in the envelope-making machine and are then passed, with the sealing flaps 33 in superimposed scale-like order, past the gumming device, for example the roller 42, in the direction of the arrow I2. The roller 42 then applies the dry-adhesive strips 33 to the inner faces of the sealing flaps 33.

Envelopes of American form may naturally also be produced by the method illustrated in Fig. 16, at first merely the dry-adhesive strips 3| being applied to the blanks 10, then the envelopes 4 finally folded and gummed in the envelope-making machine, and afterwards the dry-adhesive strips I applied to the inner faces of the sealing flaps l3 by conducting the envelopes past the gumming roller in the manner indicated in Fig. 16.

What we claim as new and desire to secure by Letters Patent is:

-1-. A method of providing envelopes, paper bags and the like withcoacting coats of dry adhesive at areas of their surfaces which are superimposed and in contact with each other upon closure of the flap, which comprises, the application of adhesive, first to one area and then to the coacting area of the envelope units at desired stages of their manufacture, respectively, each said application comprising the steps of arranging the envelope units in stepped formation so as to expose one of the respective areas of the units, applying adhesive to said area .by moving the units, the uppermost unit leading, past adhesive applying means, temporarily bending the exposed end of the unit away from the underlying unit at the moment of completion of its passage past the adhesive applyingmeans, increasing the stepping distance of the units and drying the same.

2. Apparatus for applying dry adhesive-to envelopes and the like comprising, a device for applying dry adhesive to envelopes, means for conveying envelopes in superimposed step-like formation past said device, the uppermost envelope leading, conveying means comprising parallel conveyor belts between which the envelopes are gripped, and a guide roller for said belts arranged 'opposite said device and adapted to sharply change the direction of said belts'to thereby deflect the gummed portion of the envelopes as they leave said gumming device.

3. Apparatus'for applying dryadhesive to envelopes and the like comprising, a device for applying dry adhesive to envelopes, means for conveying envelopes in superimposedstep-like formation past said device, the uppermost envelope leading, conveying means comprising parallel conveyor belts between which the envelopes are gripped, a guide roller for said belts arranged opposite said device and adapted to sharply change the direction of said belts to thereby deflect the gummed portion of the envelopes as they leave said gumming device, means to increase the stepping distance of said envelopes after. they leave said gumming device, and means to pass said envelopes through a drying device.

4. In an apparatus for applying dry adhesive to envelope and like blanks, a gumming device for applying adhesive to the said blanks when the latter are in superimposed scale-like disposal, and means for sharply deflecting the gummed portions of the blanks immediately after they move out of contact with the said gumming device for the p pose of preventing application or transfer of adhesive to any other part of the blanks.

5. In .an apparatus for applying dry adhesive to envelope and like blanks, a gumming roller for applying adhesive strips to the rear ends of the said blanks when the latter are in superimposed scale-like disposal, and .a deflecting element adapted to deflect the pathof. movement of the said blanks in such fashion that each blank, at the moment when its rear end leaves the said gumming roller, jumps inwards with its rear end towards the axis of the said roller, for the purpose of preventing application ortransfer of adhesive to any other part of the blanks.

6. In an apparatus for applying dry adhesive to envelope and like blanks, a gumming device for applying adhesive 'to' the said blanks when the latter are in superimposed scale-like disposal, and means for sharply deflecting the gummed portions of the blanks immediately after they move out of contact with the said gumming device, the said gumming device and the said deflecting means being adjustable in their spacial 

